My favorite is when they say that gay people shouldn't get married because they can't have children together. That would mean heterosexual couples where one or both people are infertile also shouldn't be allowed to get married. Every single argument they make against same sex marriage being legal is complete garbage :)

My favorite argument is when they say, y'know, marriage is a religious institution, and they don't want to go against "God's will".... it's like, literally nobody is making you go against "God's will". You don't have to have a marriage with a same-sex partner if you don't want. But if others do, you should f*** off!